ace-jump was a good package. Now it is superceded by avy (by abo-abo on GitHub) in every way + new features. For such packages that always have room for impro

ace-jump was a good package. Now it is superceded by avy (by abo-abo on GitHub) in every way + new features. For such packages that always have room for improvement and not related to core emacs functionality, it is better that they stay in external repositories on GNU Elpa or Melpa. That way, older packages do not have to get tied with emacs core. Currently Ido package is in that situation. I used to use Ido, but now I use the ivy package instead. Some people prefer to use helm instead. I would not be affected at all if Ido was removed from the emacs core in future and moved to GNU Elpa.